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Garver provided structural, civil, process, and mechanical engineering services for the design of a 40-million-gallon-per-day high-service pump station at Central Arkansas Water's (CAW) Jack H. Wilson Water Treatment Plant.
CAW’s new high-service pumping station required two years of planning and design before its construction. In addition to analyzing the station’s design, Garver and CAW considered the limited site location, major yard piping, noise control, and the inclusion of a 2,400-volt, arc-vented electrical motor control switchgear.
Garver and CAW conducted numerous design meetings and plan reviews that saved the utility both time and money.
“Only two minor change orders during the construction phase—that’s an impressive figure on any project,” said CAW Senior Engineer Blake Weindorf. “The more eyes that reviewed the plans, the greater opportunity we had to make corrections before they became change orders.”
The pumping station initially houses two 13.3 million gallons per day, constant-speed pumps with room to install another two 500-horsepower units when required. In addition, there was design consideration for a future variable-speed pump. The interior pump station piping material is prefabricated flanged steel with cement lining, and all the piping, valves, and fittings are sized to maintain a velocity of 5 feet per second or less.
The stations’ flanged steel suction and discharge headers were installed inside the building rather than buried outside the facility. This not only provides maintenance ease but also saved money by eliminating the thrust blocking and support that would be required to counter the pressure placed on the lines underground.
Muffling the stations’ noise and limiting any potential vibration was also a critical concern. Besides limiting the construction work to the morning and afternoon, CAW used isolated pump bases to dampen the vibrations and sound reaching the neighboring community. |
